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(3) Outdoor fan snow protection control (Master unit/Slave unit)
(Note) Following explanation is based on setting function with 7-segment display [P02].
However the following terminals and 7-segment function settings are available to use.
CnS1: [P07]-[5]
CnS2: [P08]-[5]
CnG1: [P09]-[5]
CnG2: [P10]-[5]
(a) The setting of this control should be done not only on the master unit but also on the slave unit, because the fans of master
unit and the slave unit are controlled independently.
(b) The control is enabled /disabled by selecting [0] or [1] displayed at 7-segment LED of master/slave units.
(c) Operation method of outdoor fan snow protection control
(i) Set the code [P02] on 7-segment display
(ii) “0” or “1” is displayed at the data display area of 7-segment LED.
“0”: Outdoor fan snow protection control is disabled (Factory setting)
“1”: Outdoor fan snow protection control is enabled
(iii) Press SW7 (Data write/delete) for 3 seconds continuously
(iv) “0” or “1” blinks every 0.5 second at the data display area of 7-segment LED.
(v) Press SW8 (one digit) to toggle the display between “0” and “1”.
(vi) If SW7 is pressed for 3 seconds continuously while “0” and “1” are blinking, “0” or “1” at the data display area of
7-segment LED stops blinking.
With this operation, the enabled/disabled setting of outdoor fan snow protection control is saved in the memory of
EEPROM, and henceforth the outdoor fan is controlled according to the contents of memory.
(vii) Contents of outdoor fan snow protection control are retained even if the power is turned off and backed on again.
(d) Contents of outdoor fan snow protection control
(i) At the status of all stop or emergency stop, if the outdoor air temperature drops 3°C or lower, all of outdoor fans are
operated at the maximum speed (4th speed) once every 10 minutes.
(ii) The outdoor fan runs for 30 minutes
(iii) During this snow protection control, the magnetic
contactor 52C1 of the compressor is ON
(4) Outdoor operation mode
On the standard models of 2 pipe system, the outdoor operation mode of Stop/Cooling/Heating is selected based on the informa-
tion of indoor units, and then respective controls are performed.
<Contents of control>
(a) Determination of outdoor operation mode
Operation mode of outdoor unit is determined based on respective signals of Operation/Stop and Cooling/Heating.
(b) Type of outdoor operation mode
1) Outdoor operation mode - Stop
2) Outdoor operation mode - Cooling
3) Outdoor operation mode - Heating
(c) Priority in operation mode selection.
1) First priority is given to the forced cooling/heating operation.
2) Second priority is given as follows
Priority in the operation mode selection can be changed using the 7-segment setting [P01].
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5
Outdoor air temperature (°C)
Fan OFF
Fan ON
'14 • KX-SM-202